How is NOx produced in a diesel engine?

Q. Why are NOx gases produced? High temperature combustion of fuels where the temperature is hot enough (above about 1300°C/ 2370°F) to oxidise some of the nitrogen in air to NOx gases. This includes burning hydrogen, as it burns at a very high temperature. Comments on diesel engines are shown below.

How much NOx does a diesel generator produce?

Diesel generator emissions can vary greatly from engine to engine depending on the age and engine tuning. 3.3 Information provided to Defra by the generator manufacturing industry indicate that unregulated diesel engines are likely to have NOX emission concentrations of between 1500 and 2200 mg/Nm3 or 12 to 17 kg/MWhe.

How are NOx and SOx formed?

SOx or sulphur oxides are formed during combustion process in the engine because of presence of sulphur content in the fuel. Following are the methods and technologies used to reduce sulphur emission from marine engines.

What are the constituents of smoke from diesel engines discuss its formation and causes?

Diesel fuel is a mixture of hydrocarbons which—during an ideal combustion process—would produce only carbon dioxide (CO2) and water vapor (H2O). Indeed, diesel exhaust gases are primarily composed of CO2, H2O and the unused portion of engine charge air.

How do you calculate NOx?

The NOx charge will be a component of vehicle registration tax as outlined below: Carbon Dioxide charge + NOx Charge = Total VRT payable. NOx is charged on the basis of milligrams per kilometre as recorded on the Certificate of Conformity. In the case of heavy duty vehicles this will be milligrams per kilowatt hour.

What are some natural sources of NOx emissions?

However, natural sources, like biological decay processes and lightning, also contribute to airborne NOx. Fuel-burning appliances, like home heaters and gas stoves, produce substantial amounts of NOx in indoor settings. NOx plays a major role in several important environmental and human health effects.

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